Journal of Supercritical Fluids最新文献_第9页

Experimental investigation on the stress of supercritical and dense-phase CO2 pipeline system in the venting process 超临界和浓相二氧化碳管道系统在排放过程中的应力实验研究

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Journal of Supercritical Fluids Pub Date : 2025-03-08 DOI: 10.1016/j.supflu.2025.106576

Zhaolan Li , Qihui Hu , Yuxing Li , Buze Yin , Liesibieke Talafubieke , Xuefeng Zhao , Lan Meng , Jianlu Zhu , Wuchang Wang

{"title":"Experimental investigation on the stress of supercritical and dense-phase CO2 pipeline system in the venting process","authors":"Zhaolan Li , Qihui Hu , Yuxing Li , Buze Yin , Liesibieke Talafubieke , Xuefeng Zhao , Lan Meng , Jianlu Zhu , Wuchang Wang","doi":"10.1016/j.supflu.2025.106576","DOIUrl":"10.1016/j.supflu.2025.106576","url":null,"abstract":"<div><div>Releasing supercritical and dense-phase CO<sub>2</sub> from pipelines entails significant phase transitions and swift depressurization. This leads to significant temperature drops and reverse thrust forces, posing risks to pipeline integrity and support structures. This study investigates stress distribution across pipeline sections during vertical and horizontal releases of supercritical and dense-phase CO<sub>2</sub>, aiming to quantify external thrust generated during discharge. Experiments were conducted at pressures ranging from 7.5 MPa to 10.0 MPa and temperatures between 25 °C and 40 °C. Maximum stress distribution across pipeline sections was measured, and a practical formula was developed to estimate external thrust during CO<sub>2</sub> discharge. The effects of impurities like N<sub>2</sub> and CH<sub>4</sub> on pipeline vibrations and stresses were also examined. Results indicate that maximum stress concentration occurs near the initial support point, mainly due to the excessive strength of a singular support structure. During CO<sub>2</sub> release, the pipeline system undergoes significant vibrations, leading to excessive longitudinal and hoop stresses. Impurities such as N<sub>2</sub> and CH<sub>4</sub> further exacerbate flow non-uniformity and vibration intensity. Notably, dense-phase CO<sub>2</sub> discharge generates higher maximum stress under identical conditions than supercritical CO<sub>2</sub> discharge. The reverse thrust formula demonstrates reasonable applicability under supercritical conditions. The findings emphasize the importance of considering phase behavior and impurity effects in pipeline safety assessments.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"222 ","pages":"Article 106576"},"PeriodicalIF":3.4,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Mechanism analysis of convective heat transfer of supercritical CO2 in heated vertical-flow tube 超临界CO2在受热垂直流管内对流换热机理分析

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-03-06 DOI: 10.1016/j.supflu.2025.106586

Lei Chen , Meng Zhu , Haoran Qing , Lingang Zhou , Can Wang , Jing Zhou , Kai Xu , Jun Xu , Long Jiang , Sheng Su , Song Hu , Jun Xiang

{"title":"Mechanism analysis of convective heat transfer of supercritical CO2 in heated vertical-flow tube","authors":"Lei Chen , Meng Zhu , Haoran Qing , Lingang Zhou , Can Wang , Jing Zhou , Kai Xu , Jun Xu , Long Jiang , Sheng Su , Song Hu , Jun Xiang","doi":"10.1016/j.supflu.2025.106586","DOIUrl":"10.1016/j.supflu.2025.106586","url":null,"abstract":"<div><div>Supercritical carbon dioxide is a promising working fluid for power generation due to its superior heat transfer properties. To investigate its heat transfer behavior under in a vertical tube under operating conditions, an combined experimental and numerical study was conducted. Parameters range from (15−27) MPa of pressure, (763–2774) kg/(m<sup>2</sup>s) of mass flux, (207−424) kW/m<sup>2</sup> of heat flux. Results show that pressure and mass flux effects on heat transfer coefficients are consistent under uniform heating conditions. However, under high heat flux conditions, the non-uniform distribution of fluid density along the flow direction reduces turbulence production, leading to a lower heat transfer coefficient. Moreover, a new heat transfer correlation was proposed. The predictive and experimental values demonstrated a high correlation, with 79.30 % of data points falling within a 10 % error range and 100 % within a 20 % error range.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"222 ","pages":"Article 106586"},"PeriodicalIF":3.4,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Phase behavior of carbon dioxide/dioctyl phthalate and trioctyl trimellitate systems 二氧化碳/邻苯二甲酸二辛酯和三甲基酸三辛酯体系的相行为

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-03-06 DOI: 10.1016/j.supflu.2025.106589

Hiroaki Matsukawa, Katsuto Otake

{"title":"Phase behavior of carbon dioxide/dioctyl phthalate and trioctyl trimellitate systems","authors":"Hiroaki Matsukawa, Katsuto Otake","doi":"10.1016/j.supflu.2025.106589","DOIUrl":"10.1016/j.supflu.2025.106589","url":null,"abstract":"<div><div>Phthalate plasticizers, which are widely used as general-purpose plasticizers for polyvinyl chloride (PVC), have been identified as harmful to human health. This has created a pressing need to separate these substances from PVC products. In addition, the potential contamination of trioctyl trimellitate (TOTM), an alternative to phthalate plasticizers, with dioctyl phthalate (DOP) cannot be overlooked. Supercritical carbon dioxide (scCO<sub>2</sub>) has been proposed as a solvent for extracting and separating these compounds; therefore, understanding the phase behavior of these systems is critical for optimizing the process design. This study investigated the phase behavior of CO<sub>2</sub>/DOP and CO<sub>2</sub>/TOTM binary systems using a synthetic method combined with a laser displacement technique to measure the movement of the piston in a high-pressure vessel. The phase boundaries were determined over temperature and CO<sub>2</sub> mole fraction ranges of (313–373) K and (0.2–0.9), respectively. The vapor–liquid equilibria of the two experimentally obtained binary systems were correlated using the Sanchez-Lacombe equation of state. The one- and two-parameter mixing rules were tested, with better correlation over a wide composition range achieved using the two-parameter mixing rule. The results of this study imply that while separating DOP and TOTM using scCO<sub>2</sub> may be challenging, scCO<sub>2</sub> shows great potential as an extraction solvent for both plasticizers.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"222 ","pages":"Article 106589"},"PeriodicalIF":3.4,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Modeling of supercritical hydrogen thermodynamic properties using cubic and SAFT type equations of state 用三次和SAFT型状态方程模拟超临界氢热力学性质

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-03-06 DOI: 10.1016/j.supflu.2025.106588

Arash Pakravesh , Amir H. Mohammadi , Dominique Richon

{"title":"Modeling of supercritical hydrogen thermodynamic properties using cubic and SAFT type equations of state","authors":"Arash Pakravesh , Amir H. Mohammadi , Dominique Richon","doi":"10.1016/j.supflu.2025.106588","DOIUrl":"10.1016/j.supflu.2025.106588","url":null,"abstract":"<div><div>Hydrogen, recognized as a future fuel, is considered one of the most sustainable energy sources. Accurate prediction of its thermophysical properties, particularly at high pressures, is essential for the design and development of industrial applications. Equations of state (EoSs), as practical tools for thermodynamic modeling, provide a reliable means of predicting hydrogen's thermodynamic properties. However, due to the variety of available EoSs comparing their performance in predicting the thermodynamic behavior of supercritical hydrogen can help optimize their application in real systems. This study assessed the accuracy of the PR, SRK, Quantum-corrected PR (QPR), three versions of the PρT-SAFT, and five versions of the PC-SAFT EoSs in predicting the thermodynamic properties of supercritical hydrogen under a vast range of pressures (10–2000 MPa) and temperatures (100–1000 K), including volumetric properties, caloric properties, and the Joule-Thomson effect. Additionally, the accuracy of SAFT type EoSs in reproducing hydrogen’s critical point was evaluated, revealing that the rescaled versions of PρT-SAFT EoS yield the most precise predictions of hydrogen's thermodynamic properties. Additionally, a comparison of SAFT and QPR type EoSs for predicting hydrogen's saturated thermodynamic properties shows that QPR performs best. Lastly, the ability of all eleven EoSs to accurately describe the thermodynamic properties of supercritical hydrogen in a limited range of pressures (10–100 MPa) and temperatures (100–400 K), which are more relevant to industrial applications, were investigated and compared with molecular dynamics simulation results. In these regions, the EoSs show promising results, with SRK and PρT-SAFT delivering the best performance.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"222 ","pages":"Article 106588"},"PeriodicalIF":3.4,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Multiscale simulation of polyethylene dissolution and dispersion for flash pressure release spinning solutions 闪蒸减压纺丝溶液中聚乙烯溶解和分散的多尺度模拟

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Journal of Supercritical Fluids Pub Date : 2025-03-06 DOI: 10.1016/j.supflu.2025.106587

Jiacheng Zhu, Jin Wen, Chao Jia, Meifang Zhu

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Crevice corrosion mechanism of L80-13Cr in Cl- containing supercritical CO2 water-rich phase considering the influence of SO2 考虑SO2影响的L80-13Cr在含Cl超临界CO2富水相中的缝隙腐蚀机理

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-03-05 DOI: 10.1016/j.supflu.2025.106577

Yu Yuan , Chen Li , Yongyang Zhao , Fengyu Zhang , Yong Xiang

{"title":"Crevice corrosion mechanism of L80-13Cr in Cl- containing supercritical CO2 water-rich phase considering the influence of SO2","authors":"Yu Yuan , Chen Li , Yongyang Zhao , Fengyu Zhang , Yong Xiang","doi":"10.1016/j.supflu.2025.106577","DOIUrl":"10.1016/j.supflu.2025.106577","url":null,"abstract":"<div><div>Given that casing materials in CO<sub>2</sub> enhanced oil recovery (EOR) and sequestration processes are exposed to corrosive environments formed by supercritical CO<sub>2</sub> and Cl<sup>–</sup>-containing water, with the crevice sensitivity yet to be fully understood, this study investigated the crevice corrosion susceptibility of L80-13Cr in Cl<sup>–</sup>-containing supercritical CO<sub>2</sub> water-rich phases using high-pressure autoclave immersion tests. The potential impact of SO<sub>2</sub> impurities in the injected carbon dioxide was also considered. The results revealed that L80-13Cr was at risk of crevice corrosion, which was further promoted by lower pH levels and the presence of SO<sub>2</sub>. The severity of corrosion within the crevice was associated with the concentration of cathodic depolarizers in the bulk solution and the stability of the passive film. These findings underscored the necessity of studying crevice corrosion susceptibility and accounting for the influence of impurities in the carbon source under CO<sub>2</sub>-EOR and sequestration conditions.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"222 ","pages":"Article 106577"},"PeriodicalIF":3.4,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Prediction of CO2 solubility in polar aprotic solvents using the PC-SAFT equation of state 用PC-SAFT状态方程预测CO2在极性非质子溶剂中的溶解度

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Journal of Supercritical Fluids Pub Date : 2025-02-28 DOI: 10.1016/j.supflu.2025.106575

Lisi Niu , Irwanjot Kaur , Anupam Yadav , Fadhil Faez Sead , Reza Shahriari

{"title":"Prediction of CO2 solubility in polar aprotic solvents using the PC-SAFT equation of state","authors":"Lisi Niu , Irwanjot Kaur , Anupam Yadav , Fadhil Faez Sead , Reza Shahriari","doi":"10.1016/j.supflu.2025.106575","DOIUrl":"10.1016/j.supflu.2025.106575","url":null,"abstract":"<div><div>In this work, the PC-SAFT equation of state (EoS) is used to predict the solubility of CO<sub>2</sub> in polar aprotic solvents (PASs). The PAS molecules are modeled as pseudo–associating molecules to mimic the polar interaction. Four scenarios are considered to study the CO<sub>2</sub> solubility in PASs. In scenario I, the CO<sub>2</sub> and PAS molecules are considered inert molecules (non-associating), in scenario II, the CO<sub>2</sub> molecules are modeled as inert, in scenario III the PAS molecules are considered inert, and in scenario IV all components are modeled as associating molecules. In scenario IV, the cross-association between PAS and CO<sub>2</sub> molecules is considered. The vapor-liquid equilibrium (VLE) of binary systems is predicted without using any additional adjustable parameters. The ARD values of scenarios I to III for all binary systems are almost the same. The average ARD values of scenarios I to III, and IV are about 22.3 %, and 11.6 %, respectively. The results show that by considering the cross-association between CO<sub>2</sub> and PAS the model performance improves dramatically. Therefore, considering non-auto associative molecules as associative ones is a trick that improves the model prediction capability.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"221 ","pages":"Article 106575"},"PeriodicalIF":3.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Investigation of SO2-induced corrosion of X65 steel in gaseous, liquid, and supercritical CO2 environments through experimental and thermodynamic approaches 通过实验和热力学方法研究二氧化硫诱导 X65 钢在气态、液态和超临界二氧化碳环境中的腐蚀问题

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Journal of Supercritical Fluids Pub Date : 2025-02-26 DOI: 10.1016/j.supflu.2025.106574

Xiu Jiang, Xiaoliang Song, Chao Yu, Hui Xie, Dingrong Qu, Jing Hua

{"title":"Investigation of SO2-induced corrosion of X65 steel in gaseous, liquid, and supercritical CO2 environments through experimental and thermodynamic approaches","authors":"Xiu Jiang, Xiaoliang Song, Chao Yu, Hui Xie, Dingrong Qu, Jing Hua","doi":"10.1016/j.supflu.2025.106574","DOIUrl":"10.1016/j.supflu.2025.106574","url":null,"abstract":"<div><div>Laboratory experiments and thermodynamic simulations were performed at 25 °C (8 MPa) and 35 °C (4, 8 MPa) to investigate the effects of SO<sub>2</sub> on the corrosion of X65 steel and water chemistry during liquid, gaseous, and supercritical CO<sub>2</sub> transportation. Results indicated that less than 100 ppm SO<sub>2</sub> significantly influenced corrosion processes. In the water-saturated CO<sub>2</sub> environment, higher SO<sub>2</sub> concentrations led to elevated general corrosion rates. Interestingly, in the CO<sub>2</sub>-saturated water environment, the general corrosion rate decreased at 35°C, 4 and 8 MPa, whereas it increased with rising SO<sub>2</sub> levels at 25°C, 8 MPa. SO<sub>2</sub> worsened water chemistry by reducing the contents of CO<sub>3</sub><sup>2-</sup> and HCO<sub>3</sub><sup>-</sup>, but enhancing the contents of H<sup>+</sup>, SO<sub>3</sub><sup>2-</sup> and HSO<sub>3</sub><sup>-</sup>in the CO<sub>2</sub>-saturated water phase at each CO<sub>2</sub> phase state. In the gaseous and supercritical CO<sub>2</sub>-saturated water environment, a thin or absent corrosion product was observed, with the adsorption of SO<sub>2</sub> and its derivatives being the dominant factor. In the liquid CO<sub>2</sub>-saturated water environment, the corrosion product competed with SO<sub>2</sub>, HSO<sub>3</sub><sup>-</sup>, and SO<sub>3</sub><sup>2-</sup> for adsorption sites, accelerating the corrosion rate.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"221 ","pages":"Article 106574"},"PeriodicalIF":3.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Preparation of ultrathin two-dimensional nanosheet Ni/TiO2-SC catalyst and their catalytic performance in the liquid-phase hydrogenation of maleic anhydride 超薄二维纳米片Ni/TiO2-SC催化剂的制备及其在马来酸酐液相加氢中的催化性能

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2025-02-26 DOI: 10.1016/j.supflu.2025.106573

Yin Zhang, Wei Wei, Chengliang Wang, Di Zhang, Haitao Li, Dongjie Zhang, Yue Zhang

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Sustainable extraction of bioactive compounds from Vismia guianensis based on the principles of green chemistry 基于绿色化学原理的桂枝生物活性化合物可持续提取

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Journal of Supercritical Fluids Pub Date : 2025-02-24 DOI: 10.1016/j.supflu.2025.106562

Kriptsan Abdon Poletto Diel , Leandro Martins Siqueira , Pablo Pitol Silveira , Júlia Maier Labes , Mariana Koetz , Lucas Cardoso Marinho , Eduardo Cassel , Rubem Mário Figueiró Vargas , Gilsane Lino von Poser

{"title":"Sustainable extraction of bioactive compounds from Vismia guianensis based on the principles of green chemistry","authors":"Kriptsan Abdon Poletto Diel , Leandro Martins Siqueira , Pablo Pitol Silveira , Júlia Maier Labes , Mariana Koetz , Lucas Cardoso Marinho , Eduardo Cassel , Rubem Mário Figueiró Vargas , Gilsane Lino von Poser","doi":"10.1016/j.supflu.2025.106562","DOIUrl":"10.1016/j.supflu.2025.106562","url":null,"abstract":"<div><div><em>Vismia guianensis</em> (Aubl.) Choisy (Hypericaceae), a medicinal plant prevalent in the Amazon Forest region, presents anthraquinones as the main compounds. This study aims to compare the chemical composition of extracts obtained using organic solvents and supercritical CO<sub>2</sub> (scCO<sub>2</sub>) under varying conditions. Additionally, mathematical models were applied to predict extraction kinetics. The results indicated that the extracts contained vismiaquinone A and physcion, among other minor anthraquinones, with scCO<sub>2</sub> proving to be more efficient in extracting both compounds. Notably, scCO<sub>2</sub> exhibited a higher selectivity for vismiaquinone A, yielding remarkably greater amounts. The mathematical modeling confirmed the consistency between the response surface method and the experimental data. In addition to demonstrating the effectiveness of an environmentally friendly extraction method, this research aims to add value to a medicinal plant widely used in Brazil, yet underexplored for its pharmacological and economic potential.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"221 ","pages":"Article 106562"},"PeriodicalIF":3.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0